On Tue, Mar 26, 2013 at 07:34:52PM +0100, Borislav Petkov wrote:
> diff --git a/kernel/events/core.c b/kernel/events/core.c
> index 7b4a55d41efc..f3bb3384a106 100644
> --- a/kernel/events/core.c
> +++ b/kernel/events/core.c
> @@ -4455,8 +4455,11 @@ static void perf_event_task_event(struct
> perf_task_event *task_event)
> next:
> put_cpu_ptr(pmu->pmu_cpu_context);
> }
> +
> + preempt_disable();
> if (task_event->task_ctx)
> perf_event_task_ctx(task_event->task_ctx, task_event);
> + preempt_enable();
>
> rcu_read_unlock();
> }
What makes me wonder here is that the code is preemptible in an
rcu_read_locked section. As far as I know preemption needs to be
disabled while holding the rcu_read_lock().
Joerg
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
